There is a law of cause and effect in the universe. A man who acquired a turbo-engine car, arrogantly refused to read the owner's manual. He took the high velocity car for a test drive; he crashed the car and died on the spot. The manufacturer had written boldly in the manual, "Reduce speed at sharp corners". In these days of liberal philosophy, ignoring God and casting his words behind has become the new normal.
Remember, even before God brought the Israelites into the promised land, he gave them "dos and don'ts" to observe. These laws were meant to regulate their relationship with him and preserve their spiritual sanctity.
God, in his mercy, sent prophets to warn them but they decided to remain adamant in rebellion and disobedience until he (God) pronounced judgement upon them, which came to pass.
Today, in preference for modern philosophies and ideologies, some people abandoned God. But wilful disobedience does not in any way obliterate his existence nor cancel the certainty of his warnings.
We must always remember that God means what he says. His word says, "If w confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness" (1 John 1:9).